Clutch.



vE. S. FARBANKS.

cLuTcH. APPUCATION FILED 1:58.17. 1916- Patentevlune 6, 1916.

WITNESS: M#

' ATTORNEY. .f 1

entran entrena onirica.

ERNEST S. FAR-BNKS, 033' GBEENFIELI), MASSACHUSETTS.

OLTCH.

i ,teaser Application filed February 17, 1916.

prises a split, and contractible and expansible ring closely locatedinside of the rim ot a loose pulley and adapted through means or'expanding devices to be placed in engagement with the pulley so that thelatter must necessarily rotate as one with the shattby which the splitring is rcrolubly carried'.

An object ot` the. present imfention is to provide means whereby attcrprotracted use and wear between the internal surfaces ot' the pulley andthe external surfaces et the clutch ring' the latter may have a. normalincreased degree of expansion tor compensation for the wear.

'Another object is to so construct the split ring 'that for itsinstallation or replacement. in its proper position on a line ot'shait'ting already set up the same may be done .without the dismantlingof the sha 'ting and appurtenances thereof.

The invention is described in conjunction with the accompanying drawingsand is set forth in the claims.

In the drawings: Figure l is a :tace View of the clutch as seen at rightangles to the axis ot the shatt. Fig. is a sectional View on a plane at.right angles to F ig. 1, and as indicated by line 2 2. Fig. 2l is a taceView showing the sectional characteristic of the split rinr.

In the. drawings, A represents the shatt lia-ring the pulley B loosethereon; and C represents a hub keyed on and to rot-atc with the shaftand provided with an arm D eX- tended toward the rim ol the pulley andcarrying a split ring lil which is positioned closely inside. of tliepulley rim, and normally free or looserclatively to the latter. The saidhub carries between radial ear pieces o n. thereof a lever (l which ispivoted at an intermediate part thcreot' in said car pieces, and suchlever has enacting therewith the conical sliding collar J, very commonand usual for the actuating devices ot clutches.

L represents a piece pivotally connected Specification of LettersPatent.

Patented Sinne 1916.

Serial No. 78,805.

to the inner end of the lever G, the Same having spaced members b bwhich areflexibly connected to such part L so as to be capable otdeflection the one relatively to the other. To the outer ends ot thesaid ilexibly connected members Z) o, toggle linl's (l ,d are pivotallyconnected, said toggle links at 'their outer ends having pivotalconnections With the separated ends of the split ring E. f

represents a screw having.-threadingen-v gagement through one ot thesaid flexibly connected members .Z2 and having by its end a crowdingbearing against the other of said members so that, after Wear betweenthe engaging surfaces of the split ring and the rim of the pulley, byinwardly turning the screw to increase its inward projection,v

the one ot' the members Z) is forced to increased separation from theother member, to, through the medium of the toggle links, increase thenormal diameter ot the split ing. y

ln Figs. l and 2 the part L is shownas constructed as an integralelement including I the portion for pivotal connection With the lever Gand the members b Z) formed as bifurcated extensions of the pivotconnecting portion; but the crotch portions or integrally toi-medportions g g' at the junction between the members b o and L are soreduced in thickness as to render the members o L resilient anddetlectable one relatiyely to the other and both relatively to thelshank4 or pivotal connection portion L.

In Fig. 3 representation is made ot" a sectional and separablevcharacter or forma-tion ot the split expanding clutch ring 13h-the ringiu its installation, and functionally, being. to all intents andpurposes the same as rqiresented in Fig. l wherein the ring, its arm Dand bul are integrally formed.; and with reference to Fig. l it. willbe- Seen that the hub. arm and split ring` are divided on a planediametrically ot' the hub, between the ear lugs a. i thereof andlengthwise ot' and between the edges of the arm; said separable sectionsbeingA detachably connected as by screws m m. engaging through the hubat the base ot' the ear pieces and through an intermediateportion ot thepivoted arm l).

l claimtl. ln a 'friction clutch` in combination, a

shaft, having a pulley loose thereon, a hub fixed on thc shaft adjacentthe pulley provided with an arm extending toward the riin of the pulleyand carrying a Split ring', positioned closely inside ol the pulleyriin, and said huh having a lever interinediately pivoted thereon, apair of toggle links een: nectedv to the t'ree ende or' the split. ring,a piece pivotallyr connected to one end ot said lever and having;-spared members bly connected theretoand having their outer endspivotall)v connected to the inner ends of Said toggle links, a screwhaving a threading,r engagement through one of said iexihl)v connectedineinbers and a crowding hearing' against the other of said members, andthe slide cone on the shaft eoaeting with said lever.

Q. ln a friction clutch` in combination, a shaft, having' a pulley loosethereon, a huh fixed on the shaft provided with an arni extendingr toYard the rim ot the pulley and earl-ying;r a split ring', positionedclosely inside of the pulley rini, and said hnb having a leverinterinediately pivoled thereon, a pair ot toggle links connected to thefree ends oi" the Splitl ring` a radially arranged element havine` aportion thereot' pivotall'vv eonneeted to one end ot Said lever andhaving iinv older portion oi hitureated iiorin, Suoh bifureatedextremities being;- resilient relative to the lever eonneetiire`portion, and having' their outer ends pivotally Connected a ;,re\vhavinj;y a threading engagement through one of the bifureated portionsand a ermvdinjjr bearing against the other of said bifureated portions.

ln a `.Friction clutch, in Combination, a shaft, having` a pulley loosethereon, and a huh fixed on the shaf'f' novided with an arm extending`toward the rim ot' the pulley and. carrying a split ring, positionedelosel'vr inside of the pnllejvv riin, and said hub having ear nienihersto and hetfween which a lever is interinediately pivoted, and said hul),arin and split ring being;- divided on a plane diainetrieally of thehuh, between Said ears and lengthwise ot and between the edges ot saidarin, and havinggthe opposite separable seetions thereotl detaehablyconnected, a pair of toggle links Connected to the free ends ot' theSplit ring, a piece pivotal@r connected to o e end ot` said lever andhaving,r spaced lnelnhers flexibly Connected thereto and having' theirouter ends; pivoially connected to the inner ends of said toggle links,and a serevv having a threading engagement through one of said iiexiblyconnected ineinhers and having by its end a crowdingT hearineV againetthe other ot said members.

Signed lo nie at Greenfield, inta presence ot two Subseribiner WitnefL

